/* Subject worlds — interactive subject cards on the home page (scenes: static/js/subject-worlds.js). */

.world-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: minmax(0, 1fr);
}

@media (min-width: 640px) {
  .world-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.25rem; }
}

@media (min-width: 1024px) {
  .world-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

.world-card {
  --tilt-x: 0deg;
  --tilt-y: 0deg;
  --mx: 50%;
  --my: 30%;
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  border-radius: 1.75rem;
  background: rgb(var(--c-surface));
  box-shadow: 0 0 0 1px rgb(var(--c-ink) / 0.07);
  transform: perspective(1000px) rotateX(var(--tilt-x)) rotateY(var(--tilt-y));
  transition: transform 500ms cubic-bezier(0.22, 1, 0.36, 1), box-shadow 300ms ease;
}

/* Soft light that follows the cursor across the card. */
.world-card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(260px circle at var(--mx) var(--my), rgb(var(--accent) / 0.14), transparent 65%);
  opacity: 0;
  transition: opacity 300ms ease;
  pointer-events: none;
}

.world-card.is-tilting {
  transition: transform 90ms linear, box-shadow 300ms ease;
  box-shadow:
    0 0 0 1px rgb(var(--accent) / 0.35),
    0 34px 60px -34px rgb(var(--accent) / 0.55);
}

.world-card.is-tilting::after { opacity: 1; }

.world-card__stage {
  position: relative;
  aspect-ratio: 16 / 10;
  background:
    radial-gradient(120% 90% at 50% 15%, rgb(var(--accent) / 0.16), rgb(var(--accent) / 0.04) 55%, transparent 80%),
    rgb(var(--c-mist));
  cursor: crosshair;
}

@media (min-width: 640px) {
  .world-card__stage { aspect-ratio: 4 / 3; }
}

.world-card__stage canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  touch-action: pan-y;
}

.world-card__body {
  display: flex;
  flex: 1;
  flex-direction: column;
  padding: 1.5rem 1.625rem 1.625rem;
}

.world-card__tag {
  width: fit-content;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: rgb(var(--accent-strong));
  font-variant-numeric: tabular-nums;
}

.world-card__title {
  margin-top: 0.375rem;
  font-size: 1.375rem;
  font-weight: 700;
  line-height: 1.35;
  color: rgb(var(--c-ink));
}

.world-card__text {
  margin-top: 0.5rem;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: rgb(var(--c-slate-500));
}

.world-card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  width: fit-content;
  margin-top: auto;
  padding-top: 1.25rem;
  font-size: 0.9375rem;
  font-weight: 600;
  color: rgb(var(--accent-strong));
  border-radius: 0.5rem;
}

.world-card__link i { font-size: 0.8125rem; transition: transform 200ms ease; }
.world-card__link:hover i { transform: translateX(-4px); }

.world-card__link:focus-visible {
  outline: 3px solid rgb(var(--accent) / 0.6);
  outline-offset: 4px;
}

@media (prefers-reduced-motion: reduce) {
  .world-card,
  .world-card.is-tilting { transform: none; transition: none; }
  .world-card__link i { transition: none; }
}